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3 cards from this section. Quick, good the night before a test.
What are tidal errors?
Think about how tides change water levels.
Why is a tide gauge important?
Consider which device reports tide information.
What causes tidal errors in hydrographic surveying?
Think about what actions lead to depth inaccuracy.
True or False: Tidal errors can be completely avoided.
Consider the variations in tide levels.
If a hydrographic survey reports a depth of 15 meters but fails to adjust for a tide that rises 3 meters, what is the actual depth?
Think about how the tide changes the perceived depth.
A survey team used a datum that is 2 meters off. If they measured a depth of 10 meters, what was the actual depth in relation to the correct datum?
Consider both scenarios for possible depth adjustments.
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